
/**
 * Copyright 2009 cestum.org
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 
package org.waveprotocol.wave.model.document.operation.util {
import mx.messaging.management.Attribute;

import org.waveprotocol.wave.model.util.Preconditions;

public class AttributeUpdate {
	public  var name:String;
	 var oldValue:String;
	 var newValue:String;

	public function AttributeUpdate(name:String, oldValue:String, newValue:String) {
		Preconditions.checkNotNull(name, "Null name in AttributeUpdate");
		this.name = name;
		this.oldValue = oldValue;
		this.newValue = newValue;
	}

	public function toString():String {
		return "[" + name + ": " + oldValue + " -> " + newValue + "]";
	}
	
	public function compareTo(b:AttributeUpdate):int {
		return name.localeCompare(b.name);
	}
}
}